What strategy did chandragupta use to conquer magadha? a. caused so much destruction that people were forced to flee b. seized the capital, and then the rest of the kingdom fell c. followed buddhism's teachings and magadha eventually surrendered d. attacked the borders first, then the capital city

Chandragupta's strategy was to attack the borders first, then the capital city.

So, your answer is D.)

trade regulation is a field of law, often bracketed with antitrust (as in the phrase “antitrust and trade regulation law”), including government regulation of unfair methods of competition and unfair or deceptive business acts or practices. antitrust law is often considered a subset of trade regulation law. franchise and distribution law, consumer protection law, and advertising law are sometimes considered parts of trade regulation law.

in general the theory of economics says that the more open to trade a country is the better   the result for the same country and the whole economies.

in real life countries impose taxes, quotas, etc which is not so good for the economies.

this kind of commercial war between the usa and china is slowing down the growth of the whole world so we can say that it is a draw back of trade regulations. and the free trade agreements are benefits of trade regulations.